diff --git a/src/mame/drivers/niyanpai.c b/src/mame/drivers/niyanpai.c
index 478bae81a38..1b478aaceed 100644
--- a/src/mame/drivers/niyanpai.c
+++ b/src/mame/drivers/niyanpai.c
@@ -944,7 +944,7 @@ static MACHINE_CONFIG_START( niyanpai, niyanpai_state )
 
 	MCFG_DEVICE_ADD("ctc", Z80CTC, 8000000 /* same as "audiocpu" */)
 	MCFG_Z80CTC_INTR_CB(INPUTLINE("audiocpu", INPUT_LINE_IRQ0))
-	MCFG_Z80CTC_ZC0_CB(DEVWRITELINE("z80ctc", z80ctc_device, trg3))
+	MCFG_Z80CTC_ZC0_CB(DEVWRITELINE("ctc", z80ctc_device, trg3))
 
 	MCFG_NVRAM_ADD_0FILL("nvram")
 
diff --git a/src/mess/drivers/x1twin.c b/src/mess/drivers/x1twin.c
index 1b565f8df66..b8603df9f1a 100644
--- a/src/mess/drivers/x1twin.c
+++ b/src/mess/drivers/x1twin.c
@@ -506,9 +506,9 @@ static MACHINE_CONFIG_START( x1twin, x1twin_state )
 
 	MCFG_DEVICE_ADD("ctc", Z80CTC, MAIN_CLOCK/4)
 	MCFG_Z80CTC_INTR_CB(INPUTLINE("x1_cpu", INPUT_LINE_IRQ0))
-	MCFG_Z80CTC_ZC0_CB(DEVWRITELINE("z80ctc", z80ctc_device, trg3))
-	MCFG_Z80CTC_ZC1_CB(DEVWRITELINE("z80ctc", z80ctc_device, trg1))
-	MCFG_Z80CTC_ZC2_CB(DEVWRITELINE("z80ctc", z80ctc_device, trg2))
+	MCFG_Z80CTC_ZC0_CB(DEVWRITELINE("ctc", z80ctc_device, trg3))
+	MCFG_Z80CTC_ZC1_CB(DEVWRITELINE("ctc", z80ctc_device, trg1))
+	MCFG_Z80CTC_ZC2_CB(DEVWRITELINE("ctc", z80ctc_device, trg2))
 
 	MCFG_DEVICE_ADD("x1kb", X1_KEYBOARD, 0)